The Data Discovery module makes sure that any confidential text or image data transmitted and stored by the users within the Exchange Online mailboxes, OneDrive storages and SharePoint Online sites of your organization will not leak to malicious users. By default, detected items containing confidential information are neither moved nor deleted, but displayed in the Quarantine list, so you can consider actions to prevent the possible leakage.
This section describes how to enable and configure the detection of credit cards data and German personally identifiable information (Driver License, Identity Card, Passport, Residence Permit, Social Security Info, Taxpayer Info) in text and image presentation.